NO blisters or 'hot spots' whatsoever. After bagging 3 of the 7 Summits and countless other climbs/hikes--have worn MANY other boots...but keep coming back to ASOLO--and the Stynger GT in particular. Not for extended/technical climbs (although they are crampon-compatible)...but for absolutely EVERYTHING else--there is no comparison! I wore them on 11 trips to Iraq and two rotations through an intensive 10-day combat shooting school (read: near-constant mud/rain/muck)--and feet were the most dry/comfortable thing on me! I even bought a second pair to keep in reserve in the event they stop making this particular model (but I hope not!). Bottom line: These boots are amazing and BackCountry is the place to get 'em!